Step 19: Host an online zombie game (this works without being host, and in public zombie matches).

Step 20: Once the zombie game loads, grab your secondary controller, and sign into the offline profile.

Step 21: You have now modded zombies on Black Ops online! With just a simple USB flash drive, congratulations!

This is for the Black Ops 1 and it will work on all the zombie maps. If you need any help then ask, The profile is the file called E0001FCAD83FF04E and the save game is obviously SaveGame there is also a notepad with all the controls. You can do Noclip, GodMode, UFO, No Target, Give yourself guns, and some more things, and it works online, after every game you need to re inject the profile onto the USB. You can also do it while you are in game then when you sign into the offline profile it will activate the mods.